My recent posts?

On some other message boards Ive been on, a special icon appears next to posts that you have participated in. Is there any way to enable something like this on ATS?

See the tab "MYATS" that's where you can "subscribe" to threads that you participate or have an interest in.

We have that in BTS,

But for ATS just look at the tab at the top of the page saying "my Ats"

you can sort out all the forums you like, and on the right hand side in My Ats you have all the threads you have replyed to or started and the last person to reply, ect.

Go have a look!